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Subjects

Science

Acids, Bases, and Salts

अम्ल, क्षारक और लवण

In Class 10 Science, under the chapter Chemical Substances – Nature and Behaviour, students study acids, bases, and salts through their properties, reactions, and everyday examples. The topic explains how these substances behave with indicators and with one another, including neutralisation, and introduces the formation and practical importance of common salts.

Practice questions

How is the acid present in lemon juice different from the acid present in curd?A student added water to concentrated acid instead of adding concentrated acid to water. Why is this dangerous?How is the gas formed in the reaction between sodium carbonate and dilute hydrochloric acid identified?In which condition will an acid show its acidic behavior most clearly?Why does dry hydrogen chloride gas not turn dry blue litmus paper red?When proper amounts of an acid and a base are mixed, which reaction mainly occurs?A bee sting contains an acidic substance. Which substance is more suitable to reduce the pain?How does an antacid give relief during stomach irritation due to excess acidity?What change occurs when red litmus is added to a sodium hydroxide solution?Why does a turmeric stain become reddish-brown when soap is applied?Which pair contains two substances of basic nature?If a solution has a very low pH value, which statement is correct about it?Why is the pH of pure water considered around seven?An agricultural soil has become too acidic. Which substance is useful to improve it?Tooth decay damages enamel more when the pH falls below which approximate value?Why is toothpaste generally made mildly basic?Why can sodium hydroxide slowly form carbonate when left open in air?What is the main use of the bleaching substance formed by the reaction of sodium hydroxide and chlorine?What main change occurs when baking soda is heated?Why does baking powder help cakes rise?